/* ============================================
   🍎 Layout — Navigation, Grid, Containers
   ============================================ */

/* ── Container ── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ── Section ── */
.section {
  padding: var(--space-4xl) 0;
  position: relative;
}

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: calc(var(--z-overlay) + 10);
  transition: all var(--duration-normal) var(--ease-out);
}

.nav.scrolled {
  height: var(--nav-height-scrolled);
}

.nav-inner {
  background: var(--glass-bg-4);
  backdrop-filter: var(--glass-blur-4);
  -webkit-backdrop-filter: var(--glass-blur-4);
  border-bottom: 1px solid var(--glass-border-2);
  height: 100%;
  transition: all var(--duration-normal) var(--ease-out);
  box-shadow:
    0 4px 20px rgba(0, 0, 0, 0.1),
    inset 0 -1px 0 var(--liquid-highlight-bottom, rgba(255,255,255,0.03)),
    inset 0 1px 0 var(--liquid-highlight-top, rgba(255,255,255,0.08));
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  letter-spacing: var(--ls-tight);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
}

.nav-logo span {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-link {
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--text-secondary);
  text-decoration: none;
  position: relative;
  padding: var(--space-xs) 0;
  transition: color var(--duration-normal) var(--ease-out);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: width var(--duration-normal) var(--ease-out);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* ── Nav Right — groups theme toggle, CTA, hamburger ── */
.nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.theme-toggle {
  background: var(--glass-bg-2) !important;
  border: 1px solid var(--glass-border-2) !important;
  transition: all var(--duration-normal) var(--ease-out);
}

.theme-toggle:hover {
  background: var(--glass-bg-3) !important;
  border-color: var(--accent-blue) !important;
}

/* ── Grid Utilities ── */
.grid {
  display: grid;
  gap: var(--space-xl);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ── Flex Utilities ── */
.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-col {
  display: flex;
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }
.gap-2xl { gap: var(--space-2xl); }